Trial of AMT Technology: AT&T and Major League Gaming (MLG) March 30, 2011 © 2011 AT&T Intellectual Property. All rights reserved.

DRAFT 2 Goal of Multicast Pilot Demonstrate both internally and to external customers that AMT Multicast is ready to become a scaled, production content distribution service — AMT Multicast is a more efficient delivery service for both AT&T (network) and the content provider (servers) — Incremental work by the content provider is more than justified in cost and operations efficiencies — End user experience is transparent with multicast delivery vs. unicast delivery o No additional help desk calls/ s/chats — End user performance is as good or better with multicast delivery vs. unicast delivery

DRAFT 3 Pilot Trial Overview Pilot was with an external customer MLG – and partner Octoshape Multicast source and download manager plug-in were the responsibility of the partner (Octoshape) — Octoshape provided the AMT GW in their plug-in client and the end user support — Octoshape was responsible for the distribution of the client — Error detection/correction was the responsibility of the download manager Network multicast and AMT Relay were the responsibility of AT&T No authentication/authorization was required on the content delivery Octoshape collected W3C files from the clients

DRAFT 4 Major League Gaming Event ● Competition among video gamers November 5 & 6, 2010, in Dallas, Texas ● US-based event, with international internet audience (approximately half from the United States) ● MLG Website provided live streaming of competition: – Total of 8 simultaneous streams – 4 free and 4 paid – The lower bandwidth (600Kb/s) streams were offered free – The higher bandwidth ( Mb/s) streams are pay-to-view MLG provided one (free) 600 Kbps stream for multicast delivery – Octoshape provided the content sources, grid technology, clients, and service features – AT&T provided the AMT Relays and multicast distribution Benefits of MLG event – Low risk test of AMT multicast capabilities

DRAFT 5 Origin to EU Platform E-T-E Latency = seconds Octoshape Ingest (location:USA) Flash App End User Platform Access Routers BB Linux Servers Multiple copies of each MC Stream for resiliency Flash Media Content from MLG. AT&TOctoshape AT&T Managed AMT Relay End-User Octo. Protocol Octo. AMT 600kbps flash stream AT&T Firewall Octoshape Multicast Source Lisle (Redundant) RTMP 2xDS3 Octoshape Broadcaster UDP Resiliency Data Octoshape Managed Architecture AT&T Firewall Grid Servers Octo. Plugin AMT Relay Core Routers Octoshape Multicast Source Middletown

DRAFT 6 Major League Gaming Pilot Statistics Unique Users19,192 Peak Users1,765 Peak Multicast Users1,686 Total Multicast Sessions77,246* Peak AMT Unicast Streams3,372 Peak Outbound Relay Traffic642 Mbps Average Session Duration13min 41sec Average Unique User Time33min 0sec Total User Hours10,557 * With Octoshape technology each end point had 2 multicast sessions November 5 & 6, 2010, in Dallas, Texas MLG provided one 600 Kbps stream for multicast delivery Octoshape responsible for non-multicast delivery 3 AMT Relays, 2 Multicast Sources

DRAFT 7 Major League Gaming Pilot Summary Pilot ObjectiveMLG Result AMT multicast is a more efficient delivery mechanism for the AT&T Network and for Content Provider/CDN 1970 GB delivered multicast 768 GB delivered unicast, grid server, peer to peer (Note: this ratio of multicast to unicast is dictated by Octoshape’s resilient delivery technology and not by the inherent capabilities of multicast.) No impediments that would prevent scaling of AMT relays None identified No impediments that would prevent scaling of streams None identified End user experience is as good as or better than unicast delivery No difference in start times No difference in session duration End user performance is as good as or better than unicast delivery No differences in packet loss/errors No additional help desk contact from end users No reported end user problems High percentage of end users can receive multicast 95.5% of end points able to receive multicast delivery

DRAFT 8 MLG Pilot End-Point Platforms OSUnique UsersPercentage Windows % Windows Vista445823% Windows XP409121% Mac OS X16849% Other100<1% Geographic Distribution (104 Countries) CountryUnique UsersPercentage United States % Canada % Denmark % United Kingdom % Other5, %